Suggestion: top slowest subtotal grouped by test file or class

[sparrowt]

Having posted pytest-dev/pytest#13675 I remembered the existence of this plugin and thought I'd open a 'suggestion' kind of ticket here - in case there is little appetite to add this (aggregated/subtotal timings) to pytest itself, perhaps this plugin might be a good place for it seeing as it is already existing this area of functionality?

For example to enable grouped subtotals perhaps this plugin could add a new argument --pytest-durations-groupby with options file or class which would then alter the output to show the top total duration of all the call/setup/teardown's that happened within each separate .py file (or unittest class).

In a large test suite this would make it much easier to identify groups of tests which, together, are slow, even if each individual test is pretty quick and does not show up in the top N.

[blake-r]

Will be issued in the nearest release.

[sparrowt]

Wow amazing... thank you!